Introduce Sky packaged apps.

services/sky_packaged_app_viewer/BUILD.gn

+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//mojo/public/mojo_application.gni")
+
+mojo_native_application("sky_packaged_app_viewer") {
+  sources = [
+    "content_handler_impl.cc",
+    "content_handler_impl.h",
+    "sky_packaged_app_viewer.cc",
+  ]
+
+  deps = [
+    "//base",
+    "//mojo/application",
+    "//mojo/common",
+    "//mojo/public/cpp/application",
+    "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/utility",
+    "//mojo/services/content_handler/public/interfaces",
+    "//mojo/services/http_server/public/cpp",
+    "//mojo/services/http_server/public/interfaces",
+    "//sky/viewer:lib",
+    "//third_party/zlib:zip",
+  ]
+}